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Process Control and Instrumentation

Process Control and Instrumentation
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is

Water
Ethylene glycol
Carbon tetrachloride
Paraffin

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Process Control and Instrumentation
On-off controllers are normally used for

Flow rate changes
Temperature changes
Low loads
None of these

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Process Control and Instrumentation
Mercury manometer (U-tube type) exemplifies a __________ order system.

Zero
First
Third
Second

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Process Control and Instrumentation
Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

1064.43
961.93
1261.93
630.74

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Process Control and Instrumentation
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

NO₂
O₂
CO₂
NO

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Process Control and Instrumentation
__________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'

Celcius
Farenhite
Rankine
Reumur

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